Comparison of a
hydrophilic and a hydrophobic
apodized diffractive
multifocal IOL.
Ruth Lapid-Gortzak MD PhD1,2,
Jan Willem van der Linden BOpt2 , and
Ivanka J. van der Meulen MD1,2
1Department
of Ophthalmology, Academic Medical Center, University of
Amsterdam, the Netherlands
2Retina Total Eye Care, Driebergen, the Netherlands
Financial Disclosure: Dr. Lapid is a speaker for Alcon, Hanita Lenses, MSD,
Oculentis, and a clinical investigator for Alcon. Mr. van der Linden and Dr. van der
Meulen have no financial interest in the subject of the poster.
INTRODUCTION
Multifocal IOLs (MFIOL) effectively treat ametropia and presbyopia. Satisfaction with MFIOLs depend
on patient motivation and on the design of the IOL optic.
Most optics use a refractive or diffractive pattern to separate the light into 2 foci – 1 for far and 1 for
near. This causes a blur circle of the focus that is not clear, but also other visual side effects. In
apodized diffractive MFIOLs the ring pattern on the optic is a source of halos and visual side effects.
Changes in this design could lead to a decrease in visual side effects.
The diffractive rings on the optic allow for separation of different foci, and apodization, which is the
different height and distance of each ring, allows for a more clear separation of different foci, and the
precise design of these apodized diffractive rings influences the balance between:
1.Distance versus near dominance of a MFIOL
2.Induction of halos by the ring pattern
3.Depth of focus of the near focus
PURPOSE:
To compare outcomes between a new design apodized diffractive hydrophilic multifocal IOL( Seelens
MF; study group), and a well-known apodized diffractive hydrophobic multifocal IOL (SN6AD1;
control group).
The IOLs
Seelens MF(Hanita Lenses, Israel)
Hydrophilic material
Optic 6 mm, haptic 13 mm
Aspheric, biconvex, posteriorly
angulated haptics 50
11 apodized diffractive rings
3600 posterior square edge of optic
reading addition: +3.0 D
SN6AD1 (“Restor +3”) (Alcon, USA)
Hydrophobic Acrysof material
Optic 6 mm, haptic 13 mm
Aspheric, biconvex, not angulated
9 apodized diffractive rings
square edge of optic & haptics
reading addition: +3.0 D
METHODS
comparative case series / refractive and visual outcomes at distance and near
/ dysphotopsia and straylight measurement scores / at 3 months postoperatively.
Figure 1:
Mean uncorrected distance visual acuity (UCDA) up to 6
months form surgery. At all time points measured
postoperatively the study group and the control group
performed equally in terms of uncorrected distance visual
acuity and was not statistically significantly different. @ 3
months: Seelens MF logMAR 0.02 + 0.07 vs SN6AD1
0.04 + 0.09.
Figure 2:
The comparison of the postoperative corrected distance
acuity up to 6 months is shown. The difference between
the groups is small but statistically significant in favour of
the study group (the Seelens MF) -0.04 + 0.05 vs control
group (SN6AD1) -0.1 + 0.04 ( <0.019).
Figure 3:
UNVA at 40 cm, at different time points in the
follow up period. The study group and the
control group perform equally well: logMAR
Seelens MF 0.09 + 0.12 versus SN6AD1 0.08 +
0.08. There were no clinical or statistically
significant differences between the groups.
Ocular Parameters: Study vs Control Group
Parameter
Sphere (D)
Cylinder (D)
Spherical Equivalent (D)
Axial Length
Anterior Chamber Depth
Study Group
Control Group P value
Mean + SD
1.14 + 1.59
0.31 + 3.12
Range
-3.5D to +5.75D -6.5D to +5.25D
Mean + SD
-0.45 + 0.38
-0.67 + 0.32
Range
0 to -1.25
-0.25 to -1.50
Mean + SD
1.19 + 1.68
-0.02 + 3.06
Range
-3.88 to +5.13
-6.88 to +5.00
mm + SD
23.47 + 1.56
23.84 +1.78
Range
22.17 to 25.54
21.01 to 27.45
mm + SD
3.33 + 0.12
3.24 + 0.43
Range
2.61-3.93
2.70-4.56
3.39 + 0.21
3.46 + 0.85
2. to 4.1
2.3 to 4.6
Preoperative Pupil Diameter mm + SD
Range
0.051
0.009
0.035
0.30
0.34
0.49
Visual quality, Halos, and Patient Satisfaction
•
•
•
Straylight changed (improved) from a mean log S of 1.276 + 0.078 in the Seelens MF group to
1.077 + 0.237 (p<0.0001). In the SN6AD1 group straylight reduced less from 1.243 + 0.594
preoperatively to 1.189 + 0.0194 postoperatively (P<0.25). The mean difference between the
study and the control group postoperatively was a -0.12 log S in favour of the study group
(p<0.002).
Halos were reported at 3 months in 3 (12%) of patients in the study group and 5 (28%) of
patients in the control group. This difference did not reach statistical significance, even though
there is a clinical significance.
Satisfaction Overall 24 (96%) in the study group were satisfied with the multifocal IOLs. In the
control group 19 (95%) patients were satisfied with the surgery and the effect on vision.
Clinically and statistically there is no difference in the satisfaction between the study and the
control group.
CONCLUSIONS:
1.The Seelens MF performs well compared to a well known multifocal apodized IOL, the SN6AD1 in
terms of distance and near acuity
2. The lens material and design of the Seelens MF clinically and statistically significantly improves
straylight and quality of vision.
3. Clinically the incidence of halos was less in the study group, however this was statistically not
significant.